It appears they will have to depart Nelson/Castlegar through YCG Castlegar. Here r the departures for tomorrow. If next leg is International, they will go to Vancouver OR Calgary could be a connection to Toronto.

Update: All 3 Air Canada (Canada-bound) flights today (Sunday May 7) are now en route, and all three are delayed:AC26 to Vancouver new ETA 11:50 AM PT (2:50 PM ET)AC18 to Montreal new ETA 7:02 PM ETAC28 to Toronto new ETA 8:04 PM ET

There are flights to Panama City via Toronto and Mexico City/Orlando, or there are some interesting routings from St. John's via Dublin and Amsterdam or Paris. Via Europe seems silly and out of the way, but it's possible. It actually comes up as a better connection than the one via Toronto.

There are flights to Panama City via Toronto and Mexico City/Orlando, or there are some interesting routings from St. John's via Dublin and Amsterdam or Paris. Via Europe seems silly and out of the way, but it's possible. It actually comes up as a better connection than the one via Toronto.

Air Canada Rouge does have a direct flight between Toronto and Panama City.